package com.yyl.common.utils.rsa;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Hashtable;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
/*
 * 生成二维码
 * */
import com.google.zxing.common.BitMatrix;
public class MatrixToImageWriter {
	private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;
     
    private MatrixToImageWriter() {}
     
       
    public static BufferedImage toBufferedImage(BitMatrix matrix) {
	    int width = matrix.getWidth();
	    int height = matrix.getHeight();
	    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
	    for (int x = 0; x < width; x++) {
	      for (int y = 0; y < height; y++) {
	        image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
	      }
	    }
	    return image;
    }
     
       
   public static void writeToFile(BitMatrix matrix, String format, File file)
       throws IOException {
     BufferedImage image = toBufferedImage(matrix);
     if (!ImageIO.write(image, format, file)) {
       throw new IOException("Could not write an image of format " + format + " to " + file);
     }
   }
     
       
   public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
       throws IOException {
     BufferedImage image = toBufferedImage(matrix);
     if (!ImageIO.write(image, format, stream)) {
       throw new IOException("Could not write an image of format " + format);
     }
   }
       
   public static void main(String[] args) throws Exception {
	   String text = "我爱你，娜娜";//二维码的内容
       int width = 400;  
       int height = 400;  
       String format = "png";    
       Hashtable hints= new Hashtable();  
       hints.put(EncodeHintType.CHARACTER_SET, "utf-8");  
       BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height,hints);  
       File outputFile = new File("E:/codeImg");  
       MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile); 
       System.out.println("It is ok!");
   }
}